Lock



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v` -LoclK.

APPLICATION FILED SEPT. 3, I920l.

1,377,658. Pfmed May 10,19%;-

l 2 SHEETS-sum1.

PATENT ori-fics.

ALFRED C. O. BOOK, OF BROOKLYN, NEW YORK, ASSIGNOR T0 THE YALE & TOWNEMANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT.

LOCE.

Specification of Letters Patent.- Patentd Rigby 10, 31921.

VApplication led September 3, 1920. Serial No. 408,009.

To all whom. t may concern Be it known that I, ALFRED C. O. BooK, asubject of Germany, and a resident of Brooklyn, in the county of Kingsand State of New York, have invented certain new and useful Improvementsin Locks; and I do hereby declare the following to be a'full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the Saule.

.My invention relates to an improvement in locks, the object being toprovide bolt mechanism constructed to interlock with the strike plate orkeeper so as to prevent a Separation of these parts by jimmying orotherwise and also to provide means for reinforcing and deadlocking thesaid bolt members so that when the door is locked the said interlockingmembers cannot be' disengaged from the strike plate or keeper except -bythe proper manipulation of the bolt actuating mechanism. I j

l/Vith these and other objects in view my invention consists in theparts and combination of parts, and in the details of construction aswill be more fully explained and pointed out in the claims: i

In the accompanying drawings; Figure 1 is a view in elevationof thelockwith the cover plate removed, the bolts being shown shaped bolts, theformer being broken away to show the shoulder 17.

10 represents the vlock casing and 11 the strike plate or keeperprovided with an opening to receive the bolt mechanism of the lock andadapted to be overlapped by the said bolt mechanism. 'Ihe face plate 12of the casing 10 is provided with a rectangular opening for the passageand free movements of the bolt 13 which latter are hook shaped and are,pivotally mounted ou pins 14 secured to the casing. These pins arelocated adjacent the ends of the slot 15 the end plate 12 of the casing,and the bolts 13 which are mounted on said pins are VI -shaped and solocated that when they are turned inwardly or retracted, their freeendsrest adjacent each other at the center as shown in Fig. 2 and flushor approximately so with the outer face of the casing 10, andwlienturned to locking position, their freeends which are at rightangles to their bodies, overhang the end walls of the bolt opening inthekeeper and lock the keeper to the lock and absolutely prevent the saidparts from being separated by a jimmy or other tool.

Each bolt is provided with a curved tail piece 16 integral with the bodyof the bolt and curved inwardly toward each other and engaging shoulders17, which in the present are in their retracted or housed position as iShown in Fig. 2, the dead locking bolt 18 rests against the latter asshown, and the curved tail pieces of the bolts rest against theshoulders on the dead locking bolt so that the bolts 13 and deadloc-king bolt 18 are so located and connected that when one movesoutwardly the other moves in the same direction. This dead lockingboltis as wide as the space between the two l.- shaped bolts when thelatter. are projected as shown in Fig. 1, and so coupled to the latterby thev curved tail pieces/as previously explained, that the movementsimparted to the. dead locking bolt 18 by the actuating springs 19 of thelatter and also by the knob and key actuated mechanism, are

transmitted to the L-shaped bolts so that the latter are controlled intheir movements by the movements of the dead locking bolt. This latterbolt is provided with two rearwardly projecting stems 20 which passthrough the cross bar 21, the latter bearing at its ends against theshoulders 22 and yieldingly held against the latter by the springs 19embracing the stems 20. rllhese springs bear at their ends respectivelyagainst the inner end of the dead locking bolt 18 and the cross bar 21and tend to force said bolt outwardly. ,j j

As the L-shaped bolts are pivoted and are moved in both directions bythe dead locking bolt, and as the latter is forced outwardly by thesprings 19 it follows that means must be provided for holding the l..-

shaped bolts in their0 retracted positions. The means I employ consistsof `a trip lever 23 pivoted at its inner end to the inner surface of thecasing and provided at its outer end with a shouldered head 24 locatedin a moved rearwardly by its contact with the strike plate 11 during theact of closing the door. As the door approaches the jamb carrying thestrike plate or keeper, the latter engages the head 24 of the trip lever23 and forces it rearwardly thus moving the head out of the plane of theL-shaped bolts 13 and permitting the springs 19 to force the deadlocking bolt 18 outwardly. As the latter moves outwardly its contactwith the bodies of the L-shaped bolts turns the latter outwardly, andthe deadV locking bolt 18 then continuing its movement outwardly betweenthe two L-shaped bolts as shown in Fig. 1, absolutely locks themAagainst movement except by the knob 27 or key mechanism 28 of the lock.

One stem 20 of the dead locking bolt is provided with a shoe 29 which isengaged by the lever 30 on the knob shank 31 for retracting the stem andits connected dead locking bolt and the said lever 30 is rovided withaprojecting stud 32 which 1s in position to be engaged by the keyactuated.

mechanism in the usual and well -known manner.

The dead-locking bolt 18 is, when projected normally held in suchposition against inward pressure applied to the exposed or projectingpart thereof by the dogging lever 33 pivoted to the inner face of thelock casing and so located that when the dead locking bolt -is projectedthe outer free end of said lever will be turnedinto the plane ofmovement of the said bolt and thus prevent it from being pushed in bypressure applied to the exposed end of same. This dogging lever 33 ismoved in one direction by a spring and is provided adjacent its pivot 34with `a laterally projecting toe 35 which is actuated by the shoulders36 and 37 formed on the hub/38 of lever 33.y When the bolts areprojected, the toe 35 rests within the re- 35 shiftsthe dogging lever 33to one side of the path of movement of the dead locking bolt thusleaving the latter free to be retracted.

T he shape of the curved tail pieces 16 of the AL-shaped bolts are suchthat after the dead locking bolt has thrown the L-shaped bolt to lockingposition, the dead locking bolt y will then be free to move outwardlywithout interference and without further movement of the L-shaped boltsuntil its outer end is approximately in a plane with the outer end oftheL-shaped bolts thus not only acting as a reinforce for the L-shapedbolts, but as a main bolt for the lock, the L-shaped bolts operatingmainly to tie the lock to the keeper 11' so as to prevent a separationof these parts. In retracting the -bolts the deadlocking bolt movesinwardly a sufficient distance to permit the L-shaped bolts to turnbefore engaging the curved tail pieces,

which, as before explained, are then engaged by the shoulders 17 on thedeadlocking, and the continued inward movement of the latter thenoperates to turn and release the L-shaped bolts from the keeper.

The lock mechanism may be actuated by a knob, and also by a keymechanism from the outer side of the door in the usual manner.

It is evident that many slight changes might be resorted to in therelative arrangement of the parts shown and described without departingfrom the spirit and scope of my invention hence, I would have itunderstood that I do not wish to confine myself to the exactconstruction and arrangement.

dead locking bolt for positively actuating both of said -L-shaped boltsand adapted to be projected between and reinforce them and also enterthe keeper and perform the function of a latch bolt, and means foractuating the dead locking bolt.

2. In a lock, the combination of a casing, the L-shaped bolts pivotedthereto, each bolt having a curved extension or tail piece, a springprojected dead locking bolt mounted to slide between and dead lock saidL-shaped bolts, and provided with shoulders for engaging the curved tailpieces on the L -shaped bolts for retracting the latter, the saiddeadlocking bolt adapted to be projected between the L-shaped bolts andinto the keeper and perform the function of an ordinary latch bolt, astem secured to said dead locking bolt, and means for retracting thelatter.

3. In a lock, the combination with a casing, a keeper, two L-shapedbolts pivoted to the casing, each having a curved'extension or tailpiece, a spring projected-dead lock- I ing bolt having rshouldersengaging the -curved extensions on the l.shaped bolts, the

piece, a spring projected dead locking bolt having a shoulder to engagesaid curved ex-v tenslon and adapted to enter the keeper and reinforcethe Il -shaped bolt,'means for dogging the deadr locking bolt and meansfor retracting the bolt and also for shifting the dogging means out ofthel path of thedead locking bolt. v r

l 5. ln a lock, the combination of a casing, a keeper, an L-shaped boltpivoted to the casing and provided with a curved tail piece,

Y a springprojected dead locking .bolt having ashoulder to engage thetail piece on the -v-i-Shaped boit, the Said dead locking boit having alimited movement independently of the L-shaped boltwhereby it`can enterthekeeper and bewith'drawn romthe latter Vwithout actuating the lllshaped bolt, and

means for 'retracting the dead locking bolt.

lspecification in the 6. In a lock, the combination of a casing,

a keeper, a dead locking bolt having a shoulder, an L-shaped boltpivoted to the casingl andadapted to be projected and retracted by thedead locking`bolt, the said L-shaped bolt'having a curved tail pieceengaged by the shoulder .on the dead locking bolt, a dogging lever forthe dead locking bolt and key and knob actuated means for shifting .Y

the dogging lever out of thepath of movement vof the dead locking boltand for retracting the latter.

7. ln a lock, the combination of a keeper', .I i

a casing, two Lshaped bolts pivoted'thereto, a spring projected deadVlocking bolt bearing against the L-shaped `bolts for moving the latterinto locking position, a trip lever carried by the locking casing andhaving a head adapted to overlap the l.shaped bolts and hold themretracted the said head adapt- I f ed tobe engaged by the keeper'andmoved out ofthe path of saidv bolts, connections be-v tween thelL-shaped bolts and dead locking bolt whereby the former. will beretracted by the latter and means for, retracting the dead locking bolt.

ln testimony whereof, l have signed this Y presence of two subscribingwitnesses.

Witnesses: L

` Jos. CONNELLY,

FREDERICK 'll. APEL.'

ALFRED c.' o. Bock. 1

